61863886 has 16 divisors (see below), whose sum is σ = 111634560. Its totient is φ = 25117560.

The previous prime is 61863883. The next prime is 61863887. The reversal of 61863886 is 68836816.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61863881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116020 + ... + 116551.

It is an arithmetic number, because the mean of its divisors is an integer number (6977160).

Almost surely, 2^61863886 is an apocalyptic number.

61863886 is a deficient number, since it is larger than the sum of its proper divisors (49770674).

61863886 is a wasteful number, since it uses less digits than its factorization.

61863886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232599.

The product of its digits is 331776, while the sum is 46.

The square root of 61863886 is about 7865.3598773356. The cubic root of 61863886 is about 395.4993119485.

The spelling of 61863886 in words is "sixty-one million, eight hundred sixty-three thousand, eight hundred eighty-six".